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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1446 (Engine Control System - 4.2L - Troubleshooting & Diagnosis) >> Diagnosis Information & Procedures >> Malfunction Indicator Lamp (MIL) Always On >> Circuit Description

Circuit Description

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Ignition voltage is supplied to the malfunction indicator lamp (MIL). The powertrain control module (PCM) turns the MIL ON by grounding the MIL control circuit.

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